Machine for forming shanks of collar-studs.



B. P. LINK.

MACHINE FOR FORMING SHANKS 0F COLLAR STUDS.

APPLICATION FILED OCT- 5, I914.

Patented Apr. 18, 1916.

4 SHEETS-SHEET I.

R. P. LINK.

MACHINE FOR FORMING SHANKS 0F COLLAR STUDS.

APPLICATIQN FILED OCT. 5, 1914.

Patented Apr. 18,1916.

4 SHEETS-SHEET 2- HE COLUMBIA PLANOGRAPH 60., WASHINGTON, D- c R. P. LINK.

MACHINE FOR FORMING SHANKS 0F COLLAR STUDS.

APPLICATION FILED OCT. s, 1914.

1m, Patented Ap1'*.18,19l6.

4 SHEETS-SHEET 3.

m5 COLUMBIA PLANODRA'PH c0., WASHINGTON, vn. G.

R. P. LINK. MACHINE FOR FORMING SHANKS 0F COLLAR STUDS.

APPLICATION FILED OCT-5.1914.

' Patented Apr. 18, 1916.

4 SHEETSSHEET 4.

LIUJHL' WEGWM$94 MACHINE FOR FORMING SHANKS- OF COLLAR-STUDS.

Specification of Letters Patent.

Patented Apr. is, rare.

Application filed. October 5, 1914. Serial No. 865,177.

To all whom it may concern Be it known that 1, Rome PERCIVAL LINK, a citizen of the United States of America, residing at Winchmore Hill, Middlesex, England, have invented a new and useful Improved Machine for Forming Shanks of Collar-Studs, of which the following is a specification.

This invention relates to an improved machine for forming shanks of collar studs of the kind in which the head of the stud has a hinge-like connection to the shank. Such shanks have heretofore been formed by subjecting them to the operation of various machines or tools to form or shape the several parts thereof.

According to the present invention, a machine is provided wherein after a suflicient length of wire has been cut from a strip or coil, the piece cut off is subjected to the operation of dies and punches which bring the said piece to its required finished shape. The machine operates automatically with out requiring supervision of each operation on the stock and enables such shanks to be formed without the production of scrap metal excepting such as is produced by short waste ends of the strips or coils.

In the improved machine the wire from which the shanks are formed is fed in definite lengths, determined either by the construction of the machine, or by adjustment of parts thereof, and these lengths are cut off by a shearing slide from which each is delivered in turn to dies which, on closing, partly shape the wire to the required form and then hold the same while it is acted upon by punches which bring it to its final form. The introduction of a fresh length of wire into the dies ejects the previously formed shank therefrom.

The accompanying drawings show how the said invention can be conveniently and advantageously carried into practice.

In the drawings: Figure 1 is a side view of the improved mechanism. Fig. 2 is a plan thereof. Fig. 3 shows a section on the line A, A, Fig. 1 drawn to a larger scale, certain of the parts occupying difierent positions in their paths of travel to that in which they are shown in Fig. 2. Fig. 4 shows parts of the feeding and ejecting devices in section on the line B, B Fig. 3. Fig. 5 shows a section on the line C, C and Fig. 6 shows a section on the line D, D Fig. 4. Figs. 7, 8 and 9 are views illustrating the shape of the shank in various stages in its formation. Fig. 10 shows a section taken on the line E, E Fig. 3. Fig. 11 is a detail plan view of a die and adjacent parts. Fig. 12 is a view mainly in section on the line F, F, Flg. 11, and Fig. 13 shows a section on the line G, G, Fig. 11. Fig. 14 shows a transverse section of the machine taken centrally through the dies and die operating toggle members.

Like reference numerals indicate corresponding parts throughout these drawings.

As shown in these drawings, 20 is a cam shaft passing through a slot in a cam bar 21 (Figs. 1 and 2) supported between and reciprocated by complementary cams 22 engaging rollers 23 projecting from the said bar which is slidably mounted in guides 24. A cam slot 25 (Fig. 5) in the bar 21 engages a roller 26 on a feed lever 27 having a forked or apertured end 28 engaging a lug 29 pivotally mounted on a stud 30 (Fig. 4) projecting from a slide 31 movable in guide ways 32. When the end 28 of the lever 27 is moved toward the left, Fig. 5, the lug 29 is rocked and clamps a wire 33 against a block 34 on the slide 31 and thereafter moves the wire 33 and slide 31 together until a definite length of the wire has been passed through a guideway 35 into a hole 36 in a shearing slide 37 movable in a slide-way 38 by means of a bell crank lever 39 link 40 and bar 41 carrying rollers 42 engaged by complementary cams 43 arranged similarly to the cams 22 and bar 21. The wire 33 passed into the hole 36 abuts against a bracket 44 acting as a length gage. When the slide 37 is moved, the portion of wire in the hole 36 is sheared from that in the guideway 35. As the slide 37 is thus moved, a die slide 46 movable in a guideway 47 by a connecting rod 48 and lever 49 carrying a roller 50 traveling in a groove in a cam 51, is simul taneously moved until these slides are brought to the positions shown in Fig. 2 with the hole 36 opposite dies 52, 53. The upper die 52 is movable relatively to the lower die 53 along dowel pins 54 and when the parts arrive in the position shown in Fig. 2, a cam slot 55 in the bar 21 moves a lever 56, Fig. 6, carrying a built-up bell-crank lever comprising three arms 57 secured together by pivot pins 59. When the intermediate arm 57 strikes against an abutment 58 (Figs. 12 and 14) the two outer arms 57 are turned about the axis of the pivots 59 so as to come-into contact with studs 60 (Figs; 3

collar'studs, a pair of forming dies, toggle and 13) projecting from the upper "die""levers', a reciprocatory ram head, pivoted le- 52, and raise tthe-. latte'r.""Subsequently a cam slot 61 in the bar 21 moves an ejector rod 62 which thrusts thewire blank 45 from the hole 86 on to the shank forming recess in the lower die. The lever 56 is then moved so that the levers 57 are carried away from the studs 60 and the upper die is, therefore loweredtoward the lower die. At Y convenient times the ejector rod and shearing slide are returned to their initial positions. The die slide is next moved into position (Figs. 3 and 10) beneath die closing toggles 63 and between ram heads 64:, 65. The head 6& is moved by a rod 66 carrying rollers 67 engaged by complementary cams 68 and the head 65 is moved by a link 69 v lever 70 and rod 71 carrying rollers 7 2 engaged by complementary cams 73. As the heads 64, 65 move together a pair of levers 7 L pivoted together at 75 and having a slotted connection with pins 76 on the said heads, are moved so as to force the knuckle of the toggles63 upon the upper die 52 and close the dies whereby one end of the blank is flattened as Y shown at 77 Fig. 8. The

. shape of the forming recesses in the dies is apparent from a comparison of Figs. 10 and 11.

After the dies have closed, punches 78, 79 are brought by the heads 6%, 65 to operate on the partly formed shank and respectively form in coifiperation with the dies, a T-head 80 at one end and a shoulder 81 near to the opposite end, as shown in Fig. 9, this being the finished shape of the shank that it is required to produce. As soon as the punches have been drawn back from the work by out-v wardmovement of the heads 64, 65, the cam shaft 20 completes one revolution and the die. slide commences to move toward the shearing slide. In the continued rotation of the camshaft the shearing slide is moved and cuts ofi another piece of the wire, while the die slide is brought back to the position shown in Fig. 2, the lever 56 being then ,moved to raise the upper die 52 during the finished shank to be detached from the I and drops down ai= ach g t r r n sllanksof 1 'vers operatively connectingthe toggle lemoved in one direction, and a punch carried by the ram head to and from one end of the forming recess between the dies.

2. In a machine for forming shanks of collar studs, a pair of forming dies, toggle levers, a ram head operating the toggle levers to close the dies, a punch carried by the ram head to and from one end of the forming recess between the dies, an ejector rod, and a reciprocatory slide moved to carry the dies into alinement with the punch and the ejector rod alternately.

3. In a machine for forming shanks of collar studs, a pair of forming dies, toggle levers, reciprocatory rain heads respectively -moving in alined paths on opposite sides of from the ends of the forming recess between the dies.

+L. In a machine for forming shanks of collar studs, a pair of forming dies, toggle levers, reciprocatory rain heads respectively moving 111 'alined paths on opposite sides of the dies, pivoted levers operatively connecting the toggle levers to the rain heads, punches carried by the rain heads to and from the ends of the forming recess between the dies, an e ector rod, and a reciprocatory slide moved to carry the dies into alinement with the punch and the ejector rod alternately.

5. In a machine for forming shanks of collar studs a pair of forming dies, means for raising the upper die from the lower die, means for closing the dies, and a reciproeatory slide carrying the dies into operative relation to the die raising means and the die closing means alternately.

6. In a machine for forming shanks of collar studs, a pair of forming dies, means for raising the upper die from the lower die, means for closing the dies, a reciprocatory slide carrying the dies into operative relation to the die raising means and the die closing means alternately, a punch and means for moving the punch toward one end of the forming recess between the dies while the dies are closed.

7. In a machine for forming shanks of collar studs, a pair of forming dies, means for raising the upper die from the lower die, toggle levers operated to close the dies, and a slidemoved to carry the dies into a position opposite to the means for raising the upper die and a position beneath the toggle levers, alternately.

8. In a machine for-forming shanks of collar studs, apair offorming dies, means for raising the upper die from the lower die, toggle levers adapted to close the dies, a punch adapted to engage in one end of the forming recess between the dies when the dies are beneath the toggle levers, a reciprocatory slide moved to carry the dies into operative relation to the die raising means and die closing means alternately, and means for moving the punch toward one end of the forming recess between the dies while the dies are closed.

9. In a machine for forming shanks of collar studs a pair of forming dies, means for raising the upper die from the lower die, toggle levers, ram heads, punches carried by the said ram heads, and pivoted levers operatively connecting the toggle levers to the ram heads to close the dies when the punches are respectively advanced by the ram heads toward opposite ends of the forming recess between the dies.

10. In a machine for forming slginks for collar studs, a pair of forming dies, means for raising the upper die from the lower die, toggle levers, ram heads, punches carried by the said ram heads movable in the central plane of movement of the toggle levers, pivoted levers operatively connecting the toggle levers to the ram heads to close the dies when the punches are respectively advanced by the ram heads toward opposite ends of the forming recess between the dies, and a reciprocatory slide carrying the dies into operative relation to the die raising means and the toggle levers alternately.

11. In a machine for forming shanks of collar studs, a pair of forming dies, means for raising the upper die from the lower die, toggle levers, reciprocatory ram heads respectively moving in alined paths on opposite sides of the dies, punches carried by the ram heads in the central plane of movement of the toggle levers, pivoted levers operatively connecting the toggle levers to the ram heads to close the dies when the punches are respectively advanced by theram heads toward opposite ends of the forming recess between the dies, an ejector rod situated opposite to the die raising means, and a reciprocatory slide carrying the dies into operative relation to the die raising means and ejector rod and operative relation to the die closing means and the punches alternately.

12. In a machine for forming shanks of collar studs, a lower forming die, an upper forming die, an oscillatory lever, bell crank levers pivotally mounted on the oscillatory lever, an abutment in the path of the bell crank levers to turn the latter on their pivots, and studs extending from the upper forming die into the path of the bell crank levers as they are moved by engagement with the abutment.

13. In a machine for forming shanks of collar studs, a shearing slide having a wire receiving hole therein, a pair of forming dies, means for raising the upper die from the lower die, means for bringing the slide and the dies into alinement and an ejector operated to thrust a piece of wire from the hole in the shearing slide into the forming recess between the opened dies.

15. In a machine for forming shanks of collar studs, a shearing slide having a wire receiving hole therein, a guideway, an intermittently operating feeding device for feeding wire through the guideway into the hole in the shearing slide, a gage limiting the length ofv wire thus fed, a pair of forming dies, means for raising the upper die from the lower die, means for moving the slide relatively to the guideway to shear the wire in the hole from the wire in the guideway and to bring the hole opposite to the opened dies, and an ejector for transferring the wire thus cut ofi to the forming recess between the dies.

16. In a machine for forming shanks of collar studs, a shearing slide having a wire receiving hole therein, a pair of forming dies, a guideway, a slide, a block on the slide, a rocking lug on the slide, an oscillatory lever for moving the rocking lug to grip a wire between the lug and the block, the slide and wire being thereafter moved together by the lever to advance the wire, a guideway through which the wire is moved into the hole in the shearing slide, means for moving the slide to cut the wire in the hole from the wire in the guideway, means for bringing the forming recess between the dies into alinement with the wire receiving hole in the slide after the slide has thus moved, and means for transferring the wire cut off from the wire receiving hole to the forming recess between the dies.

17. In a machine for forming shanks of collar studs, means for feeding wire to the machine, means for cutting ofi a predetermined length of the wire, a pair of forming dies, an oscillatory tray, a spring carried thereby, means for transferring the length of wire cut off into the forming recess between the dies and thereby thrusting a previously finished shank from between the dies into engagement with the spring, and a second spring arranged to engage the shank on the tray as the latter approaches one limit of its movement and to Withdraw the shankfrom the tray as the latter moves away from this second spring.

18. In a machine for forming shanks of collar studs, a lower forming die, an upper forming die, means for separating the upper die from the lower die, a pin slidably lodged in ahole in the said upper die, and a fixed pin engaging the slidable pin as the upper die separates from the lower die.

19. In a machine for forming shanks of Copies of this patent may be obtained for ROLLS PERCIVAL LINK.

Witnesses:

HERBERT A. BEESTON, H. CECIL BLAKE.

five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

